iris diaphragm - ορισμός. Τι είναι το iris diaphragm
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Τι (ποιος) είναι iris diaphragm - ορισμός

OPTICS AND PHOTOGRAPHY
Iris (camera); Iris diaphragm; Iris (diaphragm); Aperture diaphragm; Field stop; Diaphragm aperture; Aperture shape; Aperture shape (optics); Diffusion disc; Diffusion disc (optics); Sieve aperture; Sector aperture; Aperture blade; Diaphragm blade; Lens diaphragm
  • Aperture mechanism of Canon 50mm f/1.8 II lens, with five blades
  • Nine-blade iris
  • Pentacon 2.8/135 lens with 15-blade iris
  • Zeiss]] rotating diaphragm, 1906.<ref>Louis Derr, Photography for students of physics and chemistry London: The Macmillan Co., 1906</ref> One diaphragm with five [[aperture]]s.

Iris diaphragm         
·add. ·- An adjustable diaphragm, suggesting the iris of the eye in its action, for regulating the aperture of a lens, consisting of a number of thin pieces fastened to a ring. It is used in cameras and microscopes.
Diaphragm (optics)         
In optics, a diaphragm is a thin opaque structure with an opening (aperture) at its center. The role of the diaphragm is to stop the passage of light, except for the light passing through the aperture.
Diaphragmatic         
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  • Structure of diaphragm shown using a 3D medical animation still shot
  • Definition of ''diaphragm'' in Blount's 1707 ''Glossographia Anglicana Nova''
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SHEET OF INTERNAL SKELETAL MUSCLE
Diaphragm muscle; Hemidiaphragm; Caval opening; Vena caval foramen; Vena cava hiatus; Vena caval opening; Diaphragmatic; Diaphragm (anatomy); Vena caval hiatus; Diaphragm (lung); Venal foramen; Foramen venae; Foramen venae vacae; Hemidiaphram; Mediastinal pressure; Thoracic pressure; Intra-thoracic pressure; Thorax muscle; Musculofibrous; Foramen venae cavae; Abdominal diaphragm; Caval openings; Respiratory diaphragm; Diaphragmatic recess
·adj Pertaining to a diaphragm; as, diaphragmatic respiration; the diaphragmatic arteries and nerves.

Βικιπαίδεια

Diaphragm (optics)

In optics, a diaphragm is a thin opaque structure with an opening (aperture) at its center. The role of the diaphragm is to stop the passage of light, except for the light passing through the aperture. Thus it is also called a stop (an aperture stop, if it limits the brightness of light reaching the focal plane, or a field stop or flare stop for other uses of diaphragms in lenses). The diaphragm is placed in the light path of a lens or objective, and the size of the aperture regulates the amount of light that passes through the lens. The centre of the diaphragm's aperture coincides with the optical axis of the lens system.

Most modern cameras use a type of adjustable diaphragm known as an iris diaphragm, and often referred to simply as an iris.

See the articles on aperture and f-number for the photographic effect and system of quantification of varying the opening in the diaphragm.

Παραδείγματα από το σώμα κειμένου για iris diaphragm
1. He pioneered the modern watch and invented a diversity of gadgets, from the iris diaphragm in cameras to the universal joint used in motor vehicles.